Added functionality for partial line matching.

Added option to do partial line matching, including the % of characters that differ between lines.

-hookup for "Partial Matching" setting
-hookup for "Partial Matching Amount" setting 
Recommended setting of 10% or less. (depends on how many characters in each chat line are from towns, ranks etc)

Possible Additions:
- Ability to register settings with tabbychat from within the addon
- Ability to get all addon settings at once, map?